Arado Ar 234B Blitz
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The Arado Ar 234 ''Blitz'' (English:
lightning Lightning is a naturally occurring electrostatic discharge during which two electric charge, electrically charged regions, both in the atmosphere or with one on the land, ground, temporarily neutralize themselves, causing the instantaneous ...
) is a
jet-powered Jet propulsion is the propulsion of an object in one direction, produced by ejecting a jet of fluid in the opposite direction. By Newton's third law, the moving body is propelled in the opposite direction to the jet. Reaction engines operating o ...
bomber A bomber is a military combat aircraft designed to attack ground and naval targets by dropping air-to-ground weaponry (such as bombs), launching aerial torpedo, torpedoes, or deploying air-launched cruise missiles. The first use of bombs dropped ...
designed and produced by the German aircraft manufacturer Arado. It was the world's first operational
turbojet The turbojet is an airbreathing jet engine which is typically used in aircraft. It consists of a gas turbine with a propelling nozzle. The gas turbine has an air inlet which includes inlet guide vanes, a compressor, a combustion chamber, and ...
-powered bomber, seeing service during the latter half of the
Second World War World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposin ...
. Development of the Ar 234 can be traced back to the latter half of 1940 and the request to tender from the Ministry of Aviation to produce a jet-powered high-speed reconnaissance aircraft. Arado was the only respondent with their ''E.370'' design. While its range was beneath that of the Ministry's specification, an initial order for two
prototype A prototype is an early sample, model, or release of a product built to test a concept or process. It is a term used in a variety of contexts, including semantics, design, electronics, and Software prototyping, software programming. A prototyp ...
s was promptly issued to the company, designated ''Ar 234''. While both of the prototypes had been mostly completed prior to the end of 1941, the
Junkers Jumo 004 The Junkers Jumo 004 was the world's first production turbojet engine in operational use, and the first successful axial compressor turbojet engine. Some 8,000 units were manufactured by Junkers in Germany late in World War II, powering the Mess ...
turbojet engines were not available prior to February 1943. Due to engine unreliability, the
maiden flight The maiden flight, also known as first flight, of an aircraft is the first occasion on which it leaves the ground under its own power. The same term is also used for the first launch of rockets. The maiden flight of a new aircraft type is alwa ...
of the Ar 234 V1 was delayed until 30 July 1943. In addition to the original reconnaissance-orientated ''Ar 234A'', the fast bomber ''Ar 234B'' model was developed in response to a request by the Ministry of Aviation. Due to a lack of internal space in the relatively slender fuselage, bombloads of up to 1,500 kg (3,310 lb) had to be carried on external racks rather than in internal bomb bays. The Ar 234 was only produced in limited numbers, despite hopes that production would reach 500 per month in late 1945; this was in part due to a lack of available jet engines and other critical materials, for which the aircraft had to compete with other types, such as the
Messerschmitt Me 262 The Messerschmitt Me 262, nicknamed ''Schwalbe'' (German: "Swallow") in fighter versions, or ''Sturmvogel'' (German: "Storm Bird") in fighter-bomber versions, is a fighter aircraft and fighter-bomber that was designed and produced by the Germa ...
fighter/
fighter-bomber A fighter-bomber is a fighter aircraft that has been modified, or used primarily, as a light bomber or attack aircraft. It differs from bomber and attack aircraft primarily in its origins, as a fighter that has been adapted into other roles, wh ...
aircraft. Several models were proposed, which typically featured more powerful or alternative engines, cockpit improvements, and adaptations to function as a night fighter. During the latter portion of 1944, active
aerial reconnaissance Aerial reconnaissance is reconnaissance for a military or strategic purpose that is conducted using reconnaissance aircraft. The role of reconnaissance can fulfil a variety of requirements including artillery spotting, the collection of ima ...
missions over enemy territory commenced; the Ar 234 was almost entirely used to perform such reconnaissance missions. It was in this capacity that it become the last
Luftwaffe The ''Luftwaffe'' () was the aerial-warfare branch of the German ''Wehrmacht'' before and during World War II. Germany's military air arms during World War I, the ''Luftstreitkräfte'' of the Imperial Army and the '' Marine-Fliegerabtei ...
aircraft to fly over the
United Kingdom The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the continental mainland. It comprises England, Scotland, Wales and North ...
during the conflict, in April 1945.Boyne 1994, p. 325. In its capacity as a bomber, perhaps the most prominent use of the Ar 234 was the repeated attempts made to destroy the Ludendorff Bridge at Remagen between 7 and 17 March 1945. Many aircraft were destroyed or even captured on the ground due to a lack of servicable engines or sufficient fuel supplies.


Design and development


Background

During the closing months of 1940, the Nazi German Ministry of Aviation offered a tender for a jet-powered high-speed reconnaissance aircraft with a range of .Bauduin 2014, p. 47. Arado was the only company to respond, offering their ''E.370'' project, led by Professor Walter Blume.Ford 2013, p. 224.LePage 2009, p. 187. The design was of a high-wing mostly conventional-looking aircraft that was powered by a pair of
Junkers Jumo 004 The Junkers Jumo 004 was the world's first production turbojet engine in operational use, and the first successful axial compressor turbojet engine. Some 8,000 units were manufactured by Junkers in Germany late in World War II, powering the Mess ...
turbojet The turbojet is an airbreathing jet engine which is typically used in aircraft. It consists of a gas turbine with a propelling nozzle. The gas turbine has an air inlet which includes inlet guide vanes, a compressor, a combustion chamber, and ...
engines, one being located underneath each wing. Arado estimated that the E.370 would possess a maximum speed of at , an operating altitude of and a range of . While the range was short of the Ministry's specification, it decided to order a pair of
prototype A prototype is an early sample, model, or release of a product built to test a concept or process. It is a term used in a variety of contexts, including semantics, design, electronics, and Software prototyping, software programming. A prototyp ...
s, which were designated as the ''Ar 234''. These were largely complete before the end of 1941, but the Jumo 004 engines were not ready until February 1943. When they did arrive, the engines were considered unreliable by
Junkers Junkers Flugzeug- und Motorenwerke AG (JFM, earlier JCO or JKO in World War I, English: Junkers Aircraft and Motor Works) more commonly Junkers , was a major German aircraft and aircraft engine manufacturer. It was founded there in Dessau, Germ ...
for in-flight use and were cleared for static and taxi tests only. Months later, flight-qualified engines were finally delivered; accordingly, on 30 July 1943, the Ar 234 V1 performed its
maiden flight The maiden flight, also known as first flight, of an aircraft is the first occasion on which it leaves the ground under its own power. The same term is also used for the first launch of rockets. The maiden flight of a new aircraft type is alwa ...
from Rheine airfield.Forsyth and Beale 2020, p. 6. The second prototype, V2, crashed on 2 October 1943 at
Rheine Rheine () is a city in the district of Steinfurt in Westphalia, Germany. It is the largest city in the district and the location of Rheine Air Base. Geography Rheine is on the river Ems, approx. north of Münster, approx. west of Osnabrück a ...
near
Münster Münster (; nds, Mönster) is an independent city (''Kreisfreie Stadt'') in North Rhine-Westphalia, Germany. It is in the northern part of the state and is considered to be the cultural centre of the Westphalia region. It is also a state distr ...
after suffering a fire in its port wing, the failure of both engines, and various instrumentation failures. The aircraft dived into the ground from , killing the pilot.Dorr 2013, pp. 188. That same year, the third prototype, V3, was displayed to
Adolf Hitler Adolf Hitler (; 20 April 188930 April 1945) was an Austrian-born German politician who was dictator of Nazi Germany, Germany from 1933 until Death of Adolf Hitler, his death in 1945. Adolf Hitler's rise to power, He rose to power as the le ...
at Insterberg; he was immediately enthusiastic about the aircraft and authorised Arado to obtain factory personnel, raw materials, and the funds necessary to built two hundred by the end of 1944.Dorr 2013, p. 15. The eight prototype aircraft were fitted with the trolley-and-skid landing gear intended for the never-produced Ar 234A version. The sixth and eighth in the series were powered by four BMW 003 jet engines instead of two Jumo 004s; the sixth had the four engines in individual
nacelle A nacelle ( ) is a "streamlined body, sized according to what it contains", such as an engine, fuel, or equipment on an aircraft. When attached by a pylon entirely outside the airframe, it is sometimes called a pod, in which case it is attached ...
s, while the eighth had the engines in "twinned" nacelles underneath each wing. A 1942 engineering drawing of the E 370 showed a 1,430-litre (378 US gal) forward tank, 830 litres (219 US gal) central tank in mid-fuselage, and an aft tank of 1,540 litres (407 US gal) capacity. These were the first four-engined jet aircraft to fly. The twin-Jumo 004 powered Ar 234 V7 prototype made history on 2 August 1944 as the first jet aircraft used for a reconnaissance mission, flown by Erich Sommer.


Landing gear design

The projected weight for the aircraft was approximately . To reduce weight and maximize the internal fuel, Arado did not use retractable
landing gear Landing gear is the undercarriage of an aircraft or spacecraft that is used for takeoff or landing. For aircraft it is generally needed for both. It was also formerly called ''alighting gear'' by some manufacturers, such as the Glenn L. Martin ...
. Instead, the aircraft was to take off from a jettisonable
tricycle gear Tricycle gear is a type of aircraft undercarriage, or ''landing gear'', arranged in a tricycle fashion. The tricycle arrangement has a single nose wheel in the front, and two or more main wheels slightly aft of the center of gravity. Tricycle g ...
-style trolley, referred to as a nosewheel takeoff-carriage in English, as described in an Ar 234A Typenblatt factory drawing for the V8 prototype, and land on three retractable skids, one under the central section of the fuselage and one under each engine nacelle. The main skid, beneath the fuselage, was originally intended to fully retract, and was originally shown in a 1942-dated engineering drawing, under the E 370 airframe factory development designation, as intended to be made from a three-sided channel-section component, featuring a set of nine triple- beaded wooden rollers within the channel-section main skid. However, this landing gear did not allow aircraft to move after the landing run, which would have left aircraft scattered over an airfield, unable to taxi off the runway. Erich Sommer said that landing the skid-equipped prototypes on a wet grass airstrip "was like greased lightning" and "like
anding on Anding may refer to: Places China Districts and counties () * Anding District, Dingxi, Gansu, formerly Anding County * Zichang County, formerly Anding County Towns () * Anding, Beijing, in Daxing District, Beijing * , subdivision of Pi ...
soap", due to the complete lack of braking capability.Bauduin 2014, p. 54.


Ar 234B

At the request of the Ministry of Aviation, Arado also produced a pair of prototypes configured as a fast bomber version of the aircraft, known as the ''Ar 234B''. On 12 March 1944, the first of these, Ar 234 V9, performed its first flight; it was the first to feature a fully retractable
tricycle landing gear Tricycle gear is a type of aircraft undercarriage, or ''landing gear'', arranged in a tricycle fashion. The tricycle arrangement has a single nose wheel in the front, and two or more main wheels slightly aft of the center of gravity. Tricycle g ...
, while the main gear retracted forward into the mid-fuselage, the nose gear retracted rearwards.Forsyth and Beale 2020, pp. 6-7.Dorr 2013, p. 189. The Ar 234 had a very slender fuselage with the internal volume being largely filled with fuel tanks, thus leaving no room for an internal bomb bay, thus the bombload had to be carried on external racks. The forward-set
cockpit A cockpit or flight deck is the area, usually near the front of an aircraft or spacecraft, from which a Pilot in command, pilot controls the aircraft. The cockpit of an aircraft contains flight instruments on an instrument panel, and the ...
did not naturally provide the pilot with any direct visibility to the rear, thus the rear firing guns were aimed through a
periscope A periscope is an instrument for observation over, around or through an object, obstacle or condition that prevents direct line-of-sight observation from an observer's current position. In its simplest form, it consists of an outer case with ...
, which had been derived from the type used on tanks, that was mounted on the cockpit roof. This periscope could also be turned forwards to assist in dive-bombing runs; however, its usefulness was impacted somewhat by the scope's image being upside-down.Forsyth and Beale 2020, pp. 7-8. The defensive fixed rear gun system intended for the prototype series was generally considered useless by pilots, thus it was omitted in the Ar 234B.Bauduin 2014, p. 50. The aircraft was slightly wider at mid-fuselage to house the main landing gear, and the central fuel tank was removed for the same reason, with enlarged forward (1,800-litre/476 US gal) and aft (2,000-litre/528 US gal) fuel tanks to compensate. During flight testing, while carrying its maximum bombload of three
SC 500 bomb The SC 500 (Sprengbombe-Cylindrisch bomb (disambiguation), Sprengbombe Cylindrisch) or ''cylindrical explosive bomb'' in English was a family of general-purpose bombs used by the Luftwaffe during World War II. Design They had three-piece draw ...
s, the Ar 234 V9 could reach at ,Forsyth and Beale 2020, p. 8. faster than any other Luftwaffe bomber at the time. The normal bomb load consisted of a pair of 500 kg (1,100 lb) bombs suspended from the engines or one large 1,000 kg (2,200 lb) bomb semi-recessed in the underside of the fuselage, while the maximum bombload was 1,500 kg (3,310 lb). It could also carry the heavier BT 1400 (1,510 kg unpowered bomb-torpedo), although the ground clearance was limited. If this munition was deployed, the aircraft's fuel capacity was noticeably reduced while rocket assistance would also be used to aid takeoff. The pilot would commonly engage the autopilot while using the bomb aimer, the viewfinder of which were interfaced with the autopilot so that the aircraft's trajectory could be adjusted directly.Bauduin 2014, p. 52. Production lines were already being set up, and 20 B-0 pre-production aircraft were delivered by the end of June. Later production was slow, as the Arado plants were given the simultaneous tasks of producing aircraft from other bombed-out factories hit during the USAAF's "
Big Week Big Week or Operation Argument was a sequence of raids by the United States Army Air Forces and RAF Bomber Command from 20 to 25 February 1944, as part of the Strategic bombing during World War II#US bombing in Europe, European strategic bombin ...
",(20-25 February 1944) against the German aircraft industry, in addition to an ongoing license-construction and the nascent phasing-out of
Heinkel Heinkel Flugzeugwerke () was a German aircraft manufacturing company founded by and named after Ernst Heinkel. It is noted for producing bomber aircraft for the Luftwaffe in World War II and for important contributions to high-speed flight, with ...
's heavy He 177A bomber, even as the Arado firm was intended to be the sole subcontractor for the He 177B-series strategic bomber, meant to start construction at Arado as early as October 1944. Between mid-1944 and the end of the conflict, a total of 210 aircraft were built. During February 1945, production was switched to the C variant. It was hoped that by November 1945 production would reach 500 per month. In addition, some Ar 234 B-2 airframes were modified to serve as night fighters. Designated Ar 234B-2/N and code named ''Nachtigall'' ( Nightingale), these were fitted with FuG 218 "Neptun" VHF-band radar, with the appropriately reduced- dipole length version of the standard ''Hirschgeweih'' eight-dipole element, VHF-band transceiving AI radar antenna system, and carried a pair of forward-firing 20mm MG 151/20 autocannon within a ''Magirusbombe'' conformal gun pod on the rear fuselage hardpoint. A second crew member, who operated the radar systems, was accommodated in a cramped compartment in the rear. Two of these jury-rigged night fighters served with ''Kommando Bonow'', an experimental test unit attached to
Luftflotte Reich Luftflotte ReichFor an explanation of the meaning of Luftwaffe unit designation see Luftwaffe Organisation (Air Fleet ''Reich'') was one of the primary divisions of the German Luftwaffe in World War II. It was formed on February 5, 1944 in Berlin ...
. Operations commenced in March 1945, but the unit found the aircraft unsuitable for night fighting and no kills were recorded.


Ar 234C

The Ar 234C was equipped with four lighter weight (at 625 kg/1,380 lb apiece) BMW 003A engines mounted in a pair of twin-engine nacelles based on those from the eighth prototype.Forsyth and Beale 2020, p. 89. The primary reason for this switch was to free up the Junkers Jumo 004s for use by the Me 262, but the change improved overall thrust to nearly 3.2 tonnes (7,040 lbf) with all four BMW jets at full takeoff power, especially useful for takeoff and climb-to-altitude performance. An improved cockpit design, with a slightly bulged outline for the upper contour integrating a swept-back fairing for the periscope, used a simplified window design with fewer glazed panels for ease of production. The four BMW jet engines gave about 20% greater airspeed than the B series airframes, and the faster climb to altitude meant more efficient flight and increased range. During October 1944, the prototype Ar 234 V19 performed its maiden flight.Bauduin 2014, pp. 50-51. Although an operational test squadron was being prepared, only 14 C-series airframes had been completed by the end of the war, of which fewer than half had engines. Some were found at the end of the war sitting in the open, complete but for empty engine nacelles. Comprehensive flight testing of the new sub-type had yet to begin when Germany surrendered. Three basic variants of the C-series were planned for initial construction, with several more laid out as detailed proposals. Some of these would have had a pair of the higher thrust, but heavier Heinkel HeS 011 jet engines, while others were intended to feature swept or "crescent"-type wings.


Ar 234D

The D model was intended to be a two-seat aircraft based on the B-series fuselage, but with an enlarged cockpit using fewer glazing panels than the C version, powered by a pair of more powerful Heinkel HeS 011 turbojet engines. The HeS 011 powerplant never reached quantity production, with only 19 examples of the new powerplants ever created. No 234D was produced, only a few wooden engineering mockups.


Ar 234P

The P model was intended to be a two-seat night fighter version with a variant of the D-series cockpit, differing in powerplant options and several options of radar. Several were in the planning stage, but none made it into production.


Operational history

By 1944, the Luftwaffe's bombing capability had been severely degraded on account of attrition from the extended combat across multiple fronts that it was being tasked with.Forsyth and Beale 2020, p. 9. Accordingly, despite the performance potential represented by the pending arrival of production Ar 234s that year, there was a shortage of experienced bomber pilots to crew them. The first unit-level type conversion directives were issued to III/KG 76 in May 1944; personnel had to be disengaged from flying legacy types such the Junkers Ju 88 on the front lines and brought to central Germany for familiarisation with the aircraft and its unfamiliar form of propulsion.Forsyth and Beale 2020, pp. 9-12. This process was greatly assisted by the use of twin-seat
Messerschmitt Me 262 The Messerschmitt Me 262, nicknamed ''Schwalbe'' (German: "Swallow") in fighter versions, or ''Sturmvogel'' (German: "Storm Bird") in fighter-bomber versions, is a fighter aircraft and fighter-bomber that was designed and produced by the Germa ...
s.Forsyth and Beale 2020, p. 43. Various challenges were encountered in trying to bring the Ar 234 up to operational status; these allegedly included the poor quality of worksmanship present on some aircraft, and an increasingly severe shortage of certain resources, such as aviation-grade fuel.Forsyth and Beale 2020, pp. 18-19. The reliability of the Jumo 004 engines would actually worsen over time, a trend that the aviation historian Philippe Bauduin attributed to the use of ill-suited fuel.Bauduin 2014, p. 53. Issues with the engines included constant flameouts and the necessity of their overhaul or total replacement after roughly ten hours of operation; as ground crews became more skilled, the time taken to swap engines was greatly reduced.Forsyth and Beale 2020, p. 45. Furthermore, it had been observed that the aircraft's lengthy takeoff runs were responsible for several accidents; attempts at resolution included improvements to pilot training to the use of twin jettisonable liquid fuel ''Starthilfe'' rocket assisted takeoff units, one under each outer wing.Forsyth and Beale 2020, p. 25. Accidents would often be fatal due to the lack of an
ejector seat In aircraft, an ejection seat or ejector seat is a system designed to rescue the pilot or other crew of an aircraft (usually military) in an emergency. In most designs, the seat is propelled out of the aircraft by an explosive charge or rocket ...
, the pilot instead being left to exit the aircraft in an emergency via a glass hatch in the floor of the cockpit that proved to be highly impractical. During August 1944, several of the Ar 234 prototypes - including a few of the surviving six Ar 234A-series prototypes - were dispatched on active aerial reconnaissance missions. The seventh prototype would perform the first reconnaissance mission over the United Kingdom by a Luftwaffe jet.Dorr 2013, pp. 113-114. Amongst other purposes, these reconnaissance flights were used to assess the potential for an Allied naval invasion of the
Netherlands ) , anthem = ( en, "William of Nassau") , image_map = , map_caption = , subdivision_type = Sovereign state , subdivision_name = Kingdom of the Netherlands , established_title = Before independence , established_date = Spanish Netherl ...
.Bauduin 2014, p. 51.
Allied An alliance is a relationship among people, groups, or states that have joined together for mutual benefit or to achieve some common purpose, whether or not explicit agreement has been worked out among them. Members of an alliance are called ...
fighter aircraft, even when they were able to make visual contact with them, proved unable to intervene against them, being incapable of matching their speed.Forsyth and Beale 2020, p. 77. The aircraft were relatively difficult to encounter, possessing a relatively high cruising speed of roughly while flying at an altitude in excess of . During the autumn of 1944, the first Ar 234Bs begun to enter service. Early missions included attacks in the
Low Countries The term Low Countries, also known as the Low Lands ( nl, de Lage Landen, french: les Pays-Bas, lb, déi Niddereg Lännereien) and historically called the Netherlands ( nl, de Nederlanden), Flanders, or Belgica, is a coastal lowland region in N ...
, striking at the docks at
Antwerp Antwerp (; nl, Antwerpen ; french: Anvers ; es, Amberes) is the largest city in Belgium by area at and the capital of Antwerp Province in the Flemish Region. With a population of 520,504,
and a railway station in
Brussels Brussels (french: Bruxelles or ; nl, Brussel ), officially the Brussels-Capital Region (All text and all but one graphic show the English name as Brussels-Capital Region.) (french: link=no, Région de Bruxelles-Capitale; nl, link=no, Bruss ...
.Forsyth and Beale 2020, pp. 52-54. The type was used directly against Allied units during the
Battle of the Bulge The Battle of the Bulge, also known as the Ardennes Offensive, was the last major German offensive (military), offensive military campaign, campaign on the Western Front (World War II), Western Front during World War II. The battle lasted fr ...
; in January 1945, numerous Ar 234s were dispatched to attack artillery positions to the north of
Bastogne Bastogne (; nl, Bastenaken, ; german: Bastnach/Bastenach; lb, Baaschtnech) is a city and municipality of Wallonia located in the province of Luxembourg in the Ardennes, Belgium. The municipality consists of the following districts: Bastogne, ...
.Forsyth and Beale 2020, p. 54.LePage 2009, p. 188. One month later, the Allies were able to capture a crashed Ar 234 after it had been forced by a
Republic P-47 Thunderbolt The Republic P-47 Thunderbolt is a World War II-era fighter aircraft produced by the American company Republic Aviation from 1941 through 1945. It was a successful high-altitude fighter and it also served as the foremost American fighter-bombe ...
to crash-land. The type was also saw action in Northern Italy.Forsyth and Beale 2020, p. 70. Perhaps the most notable use of the Ar 234 in the bomber role was the attempt to destroy the Ludendorff Bridge at Remagen. Between 7 March, when it was captured by the Allies, and 17 March, when it finally collapsed, the bridge was continually attacked by Ar 234s of III/KG 76 carrying bombs. Due to these attacks being made from a low altitude, serious losses were encountered from ground-based anti-aircraft guns, while the majority of bombs delivered by the type missed the bridge anyhow.Bauduin 2014, p. 57.Dorr 2013, p. 210. By 10 April 1945, a total of 38 operational Ar 234s were reportedly on strength with the Luftwaffe, comprising 24 reconnaissance aircraft, 12 bombers, and two night-fighters.Bauduin 2014, p. 57. However, a large number simply sat on German airfields awaiting fuel that never arrived or qualified personnel to operate them. The Ar 234 continued fly combat missions in an increasing ad hoc fashion up until the surrender of Germany on 8 May 1945. Several were recorded as having been lost in combat, either shot down in
air combat ''Air Combat'' is a 1995 combat flight simulator developed and published for the PlayStation by Namco. Players control an aircraft and are tasked with completing a series of missions, with objectives ranging from destroying formations of enemie ...
, destroyed by flak, or "bounced" by Allied fighters during takeoff or on the landing approach. Numerous examples were captured by the Allies.Dorr 2013, p. 249.


Variants

''Data from:'' Aircraft of the Third Reich Vol.1Green 2010, pp. 64–84. ;Arado E 370:Draft proposal submitted to the ''Reichsluftfahrtministerium'' (RLM) for a fast jet reconnaissance bomber. ;Ar 234 V1 to V5: Initial prototypes of the Ar 234A with skid landing gear, take-off tricycle gear trolley with trio of retractable landing skids, and two Jumo 004 engines. ;Ar 234 V6 & V8:Prototypes for four-engined designs for the Ar 234, meant to use the alternative choice of the lower-thrust BMW 003 turbojet engines while retaining the A model skid/trolley undercarriage. The V6 was fitted with the quartet of BMW 003s in individual nacelles, unlike the V8 prototype which had the BMW jet engines in a pair of "twinned" nacelles, and essentially "prototyped" what would become the four-engined Ar 234C's engine installation. ;Ar 234 V7:Development aircraft for the Ar 234B production aircraft, retaining the A-series' intended skid undercarriage, and saw active service. ;Ar 234 V9 to V11:Representative prototypes of the Ar 234B production aircraft, with the V9 being the first airframe with retractable tricycle undercarriage. ;Ar 234 V13 & V20 :A pair of B-series prototypes fitted with four BMW 109-003 engines for the C-series aircraft, using the V8 prototype's "twinned" nacelle design, but without the V8 retractable wing-skids. ;Ar 234 V15: A single B-series airframe fitted with 2 x BMW 003 engines for engine development testing, and rumored to have been considered for new wing planform tests. ;Ar 234 V21 to V30:C-series development aircraft. V26 and V30 had experimental thick section wooden and thin section metal laminar flow wings. ;Ar 234 V16:Intended to be fitted with an experimental
crescent wing The crescent wing is a fixed-wing aircraft configuration in which a swept wing has a greater sweep angle on the inboard section than the outboard, giving the wing a crescent shape. The planform attempts to reduce several unpleasant side-effects of ...
with sweep back lessening towards the tips, evolved by
Rüdiger Kosin Rüdiger (English ''Ruediger'', ''Rudiger'', Roger) is a German given name. The meaning comes from Old High German: ''hruod'' (fame) and ''ger'' (spear). The name became popular because of the character Rüdiger von Bechelaren from ''Nibelung''. P ...
and Walther Lehmann. The wing was constructed but was destroyed before it could be fitted. ;Ar 234 A:The first proposed production reconnaissance bomber fitted with skid undercarriage and take-off tricycle gear trolley, built only as the series of eight trolley-and-skid undercarriage V1 through V8 prototypes. ;Ar 234 B-0: 20 pre-production aircraft. ;Ar 234 B-1: Reconnaissance version, equipped with two Rb 50/30 or Rb 75/30 cameras. All reconnaissance variants were converted from B-2 aircraft with '' Rüstsatz'' b. ;Ar 234 B-1 Berlin N: Two-engined aircraft, this was a wind tunnel test aircraft based on Ar 234 B-1 with FuG 244 Berlin N radar installed on top. The purpose of this plane was to be an early warning jet and also a fighter control jet.Herwig 2003, ;Ar 234 B-2 : Bomber version, with a maximum bombload of 1,500 kg (3,307 lb). ;Ar 234 B-2/N: Night fighter version, two aircraft converted from B-2. ;Ar 234 C-1: Four-engined aircraft – all C-series Ar 234s powered with a quartet of BMW 003 jet engines – as installed on the Ar 234 V8 prototype, otherwise similar to the Ar 234 B-1. ;Ar 234 C-2: Four-engined aircraft similar to the Ar 234 B-2. ;Ar 234 C-3: Multi-purpose version, armed with two 20 mm MG 151/20 cannons beneath the nose. ;Ar 234 C-3/N: Proposed two-seat night fighter version, armed with two forward-firing 20 mm MG 151/20 and two 30 mm (1.18 in)
MK 108 cannon The MK 108 (German: ''Maschinenkanone''—"machine cannon") was a 30 mm caliber autocannon manufactured in Nazi Germany, Germany during World War II by Rheinmetall‑August Borsig, Borsig for use in aircraft. The cannon saw widespread use as an ...
s, fitted with a mid-VHF band FuG 218 '' Neptun V''
radar Radar is a detection system that uses radio waves to determine the distance (''ranging''), angle, and radial velocity of objects relative to the site. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, w ...
. ;Ar 234 C-4: Armed reconnaissance version, fitted with two cameras, armed with four 20 mm MG 151/20 cannon. ;Ar 234 C-5: Proposed version with side-by-side seating for the crew. The 31st prototype was converted into this variant.Fleischer & Rys ;Ar 234 C-5 Berlin N: Proposed C-5 with a FuG 244 Berlin-N rotating radar dish on top of the plane, for early warning and fighter control role ;Ar 234 C-6: Proposed two-seat reconnaissance aircraft. The 32nd prototype was converted into this variant. ;Ar 234 C-7: Night fighter version, with side-by-side seating for the crew, fitted with an enhanced FuG 245 Bremen O cavity magnetron-based centimetric (30 GHz) radar. ;Ar 234 C-8: Proposed single-seat bomber version, powered by two 1,080 kg (2,380 lb) Jumo 004D turbojet engines. ;Ar 234 D-1: Proposed reconnaissance version. Not built. ;Ar 234 D-2: Proposed bomber version. Not built. ;Ar 234 P-1 : Two-seater with four BMW 003A-1 engines; one 20 mm MG 151/20 and one 30 mm (1.18 in) MK 108. ;Ar 234 P-2 : Also a two-seater, with redesigned cockpit protected by a 13 mm (0.51 in)
armour plate Military vehicles are commonly armoured (or armored; see spelling differences) to withstand the impact of shrapnel, bullets, shells, rockets, and missiles, protecting the personnel inside from enemy fire. Such vehicles include armoured fight ...
. ;Ar 234 P-3: HeS 011A powered P-2, but with two cannon. ;Ar 234P-4: as P-3 but with Jumo 004D engines. ;Ar 234P-5: Three-seat version with HeS 011A engines, one 20 mm MG 151/20 and four 30 mm (1.18 in) MK 108 cannon. ;Ar 234 R: Rocket-powered short range high-altitude reconnaissance versionVan Pelt 2012, p. 100. It had a rocket engine in its tail, while the turbojets had been discarded. It would be towed by a He 177 to 8 km altitude after which it would propel itself to 17 km altitude over the target after which it would glide back unpowered. Project only.


Operators

; *
Luftwaffe The ''Luftwaffe'' () was the aerial-warfare branch of the German ''Wehrmacht'' before and during World War II. Germany's military air arms during World War I, the ''Luftstreitkräfte'' of the Imperial Army and the '' Marine-Fliegerabtei ...
** 1./''Versuchsverband'' OKL, headquarters unit ** ''Sonderkommando Götz'' (named for pilot Horst Götz), two prototype aircraft, was then increased in size and became; ** ''Sonderkommando Sperling'', carried reconnaissance on
Western front Western Front or West Front may refer to: Military frontiers *Western Front (World War I), a military frontier to the west of Germany *Western Front (World War II), a military frontier to the west of Germany *Western Front (Russian Empire), a majo ...
and UK and helped to train crews of; ** 1./''Fernaufklärungsgruppe'' (FAGr) 123 (long distance reconnaissance unit) ** ''Sonderkommando Hecht'', carried out reconnaissance of southern portion of Western Front and also intended to train crews of; ** 1./FAGr 100 (reconnaissance unit) ** ''Sonderkommando Sommer'', carried out reconnaissance in Italy and also intended to train crews of; ** 1./FAGr 33 (reconnaissance unit) ** ''Sonderkommando Bonow'', (night fighter unit) ** '' Kampfgeschwader 76'' (bomber unit)


Surviving aircraft

Only one Ar 234 survives today, a B-2 bomber variant with manufacturer's serial number 140312. It was one of nine Ar 234s surrendered to British forces at
Sola Airfield Sola Air Station ( no, Sola flystasjon) is a base for the Royal Norwegian Air Force. It is located in Sola municipality in Rogaland county, Norway. Rescue Helicopter Service is stationed at Sola along with No. 330 Squadron RNoAF, Helicopter Squad ...
near
Stavanger Stavanger (, , American English, US usually , ) is a city and municipalities of Norway, municipality in Norway. It is the fourth largest city and third largest metropolitan area in Norway (through conurbation with neighboring Sandnes) and the a ...
, Norway. The aircraft had been operating with ''8. Staffel'' III./'' Kampfgeschwader 76'' (later reorganised as ''Einsatzstaffel'') during the final weeks of the war, having operated previously with the 8th squadron, carrying the full-four-character ''Geschwaderkennung'' military code "F1+GS" on the fuselage sides, with the wing code "F1" painted in a much reduced size for sanctioned, late-war "low-visibility" requirements. Teams of the USAAF's Operation Lusty were collecting examples of Luftwaffe technology for study. This aircraft and three others were traded to Operation Lusty by
Eric "Winkle" Brown Captain Eric Melrose "Winkle" Brown, CBE, DSC, AFC, Hon FRAeS, RN (21 January 1919 – 21 February 2016) was a British Royal Navy officer and test pilot who flew 487 types of aircraft, more than anyone else in history. Brown holds the worl ...
(test pilot and commanding officer of the Enemy Aircraft Flight at the
Royal Aircraft Establishment The Royal Aircraft Establishment (RAE) was a British research establishment, known by several different names during its history, that eventually came under the aegis of the Ministry of Defence (United Kingdom), UK Ministry of Defence (MoD), bef ...
) in exchange for an interview with Hermann Göring who was then being held by the Americans.Brown 2006, p. 115. The aircraft was flown from Sola to
Cherbourg Cherbourg (; , , ), nrf, Chèrbourg, ) is a former commune and subprefecture located at the northern end of the Cotentin peninsula in the northwestern French department of Manche. It was merged into the commune of Cherbourg-Octeville on 28 Feb ...
in France on 24 June 1945 where it joined 34 other German aircraft to be shipped to the U.S. aboard the British aircraft carrier . ''Reaper'' departed from Cherbourg on 20 July and arrived at
Newark, New Jersey Newark ( , ) is the most populous city in the U.S. state of New Jersey and the seat of Essex County and the second largest city within the New York metropolitan area.Freeman Army Airfield : ''For the civil use of this facility after 1946, see Freeman Municipal Airport '' Freeman Army Airfield is an inactive United States Army Air Forces base. It is located south-southwest of Seymour, Indiana. The base was established in 1942 a ...
,
Indiana Indiana () is a U.S. state in the Midwestern United States. It is the 38th-largest by area and the 17th-most populous of the 50 States. Its capital and largest city is Indianapolis. Indiana was admitted to the United States as the 19th s ...
for testing and evaluation. 140312 was assigned the foreign equipment number FE-1010. The fate of the second Ar 234 flown to Freeman Field remains a mystery. One of the remaining two was reassembled by the
United States Navy The United States Navy (USN) is the maritime service branch of the United States Armed Forces and one of the eight uniformed services of the United States. It is the largest and most powerful navy in the world, with the estimated tonnage ...
at Naval Air Station Patuxent River, Maryland, for testing, but was found to be in unflyable condition and scrapped. After receiving new engines, radio and oxygen equipment, 140312 was transferred to
Wright Field Wilbur Wright Field was a military installation and an airfield used as a World War I pilot, mechanic, and armorer training facility and, under different designations, conducted United States Army Air Corps and Air Forces flight testing. Loca ...
near
Dayton, Ohio Dayton () is the sixth-largest city in the U.S. state of Ohio and the county seat of Montgomery County. A small part of the city extends into Greene County. The 2020 U.S. census estimate put the city population at 137,644, while Greater Day ...
and delivered to the Accelerated Service Test Maintenance Squadron of the Flight Test Division in July 1946. Flight testing was completed on 16 October 1946 though the aircraft remained at Wright Field until 1947. It was then transferred to
Orchard Place Airport Chicago O'Hare International Airport , sometimes referred to as, Chicago O'Hare, or simply O'Hare, is the main international airport serving Chicago, Illinois, located on the city's Northwest Side, approximately northwest of the Loop business ...
in
Park Ridge, Illinois Park Ridge is a city in Cook County, Illinois, Cook County, Illinois, United States, and a Chicago suburb. Per the 2020 United States Census, 2020 census, the population was 39,656. It is located northwest of downtown Chicago. It is close to O' ...
, and remained there until 1 May 1949 when it and several other aircraft stored at the airport were transferred to the
Smithsonian Institution The Smithsonian Institution ( ), or simply the Smithsonian, is a group of museums and education and research centers, the largest such complex in the world, created by the U.S. government "for the increase and diffusion of knowledge". Founded ...
. During the early 1950s, the Ar 234 was moved to the Smithsonian's Paul Garber Restoration Facility at
Suitland, Maryland Suitland is an unincorporated community and census designated place (CDP) in Prince George's County, Maryland, United States, approximately one mile (1.6 km) southeast of Washington, D.C. As of the 2020 census, its population was 25,839. Prio ...
for storage and eventual restoration.Boyne 1982, p. 184. The Smithsonian began restoring 140312 in 1984 and finished in February 1989. All paint had been stripped from the aircraft before the Smithsonian received it, so the aircraft was painted with the markings of an aircraft of 8./KG 76, the first operational unit to fly the "Blitz". The restored aircraft was first displayed at the Smithsonian's main museum building in 1993 as part of a display titled "Wonder Weapon? The Arado Ar 234". In 2005 it became one of the first aircraft moved to the new Steven F. Udvar-Hazy Center near Dulles International Airport. Today, 140312 is displayed next to the last surviving
Dornier Do 335 The Dornier Do 335 ''Pfeil'' ("Arrow") was a heavy fighter built by Dornier for Germany during World War II. The two-seater trainer version was called ''Ameisenbär'' ("anteater"). The ''Pfeil''s performance was predicted to be better than other ...
, one of the other aircraft that accompanied it on its voyage across the Atlantic Ocean aboard the ''Reaper''. This aircraft is displayed with a pair of ''Starthilfe''
RATO Rato is a village in the Cornillon commune in the Croix-des-Bouquets Arrondissement, Ouest department of Haiti Haiti (; ht, Ayiti ; French: ), officially the Republic of Haiti (); ) and formerly known as Hayti, is a country located o ...
units mounted under its wings. These may be the only surviving examples to be mounted on an aircraft design that actually used them during the conflict.


Specifications (Ar 234B-2)


See also


References


Notes


Citations


Bibliography

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External links


Air Vectors - Arado Ar 234

Sole surviving example of the Ar 234-Smithsonian National Air and Space Museum

Video of Walter ''Starthilfe'' RATO units in use on Ar 234s, both trolley and landing gear versions

Captured original German film featuring Ar 234 V9 prototype (first with retractable gear) and closeups of a trolley/skid Ar 234A prototype
{{Authority control
Ar 234 The Arado Ar 234 ''Blitz'' (English: lightning) is a jet-powered bomber designed and produced by the German aircraft manufacturer Arado. It was the world's first operational turbojet-powered bomber, seeing service during the latter half of the ...
1940s German bomber aircraft World War II bombers of Germany World War II jet aircraft of Germany Quadjets German inventions of the Nazi period High-wing aircraft Aircraft first flown in 1943